Sigma 24mm f/1.4 DG HSM | A review – Curvilinear distortion
Our charts reveal that Sigma has done a good job of controlling distortion, with just a low level of barrel distortion visible. In general, we expect low distortion from primes – it’s one good reason to choose them over zooms – but it usually comes with a greater trade-off against corner sharpness.
The chart below represents the lens’s distortion. The arrows indicate the direction in which grid points are distorted from their ideal position, and the relative magnitude of their displacement. The grid itself illustrates a small amount of barrel distortion, with a little re-correction into the corners.
This real-world example shows just how little distortion is visible in normal use. The lines towards the lower edge of the frame are kept impressively straight.
